// analyze.go contains all data analysis
package main

import (
	"fmt"
)

// Data for Month
type Month struct {
	Month int
	MonthName string
	Year int
	Days []int

	Earnings float64

	Workhours float64
	//Workdays int
	Tasks []int
	Projects []int
}

var analysis []Month


//Analyze all tasks and PAyments 
func MakeAnalysis() {
	fmt.Println("Making Analysis")

	tids := GetTaskIds()
	alltasks := GetSelectedTasks(tids)

	for _,ta := range alltasks {
		year,monthn,day := ta.Start.Local().Date()
		month := int(monthn)
		monthstr := fmt.Sprintf("%v",monthn)
		exist, exid := MonthExists(year,month)
		dur := ta.Duration()

		if exist {
			if !isElement(day,analysis[exid].Days){
				analysis[exid].Days = append(analysis[exid].Days,day)
			}
			analysis[exid].Workhours += dur
			analysis[exid].Tasks = append(analysis[exid].Tasks,ta.Id)
			if !isElement(ta.Projectid,analysis[exid].Projects){
				analysis[exid].Projects = append(analysis[exid].Projects,ta.Projectid)
			}
		}else{
			analysis = append(analysis,Month{
				month,
				monthstr,
				year,
				[]int{day},

				0.0,  //Earning

				dur,  //Workhours
				[]int{ta.Id},[]int{ta.Projectid}})
		}

	}
	pays := GetAllPayments()
	for _,py := range pays {
		year,monthn,_ := py.Date.Local().Date()
		month := int(monthn)
		monthstr := fmt.Sprintf("%v",monthn)
		exist, exid := MonthExists(year,month)

		if exist {
			analysis[exid].Earnings += py.Amount
		}else{
			analysis = append(analysis,Month{
				month,
				monthstr,
				year,
				[]int{},

				py.Amount,  //Earning

				0.0,  //Workhours
				[]int{},
				[]int{}})
		}
	}
	//fmt.Println("Length:",len(analysis))
	ShowFullAnalysis()
}


//Show full analysis
func ShowFullAnalysis() {
	fmt.Println(frame("Full Analysis",true))
	for _,mo := range analysis {
		fmt.Println(sli,mo.Year,mo.MonthName)
		fmt.Printf("%s Workhours: %.2f\n",nli,mo.Workhours)
		fmt.Println(nli,"    Days:",mo.Days)
		cnt, hr, dur := AnalyzeTasks(GetSelectedTasks(mo.Tasks))
		fmt.Println(nli,"   Tasks:",cnt,"Hours:", hr)
		fmt.Println(nli,dur)
		fmt.Println(nli,"Projects:",len(mo.Projects))
	}
	fmt.Println(frame("",false))
}


// Test if analysis slice conatins the month already and return its id if
func MonthExists(year, month int) (exist bool, id int) {
	for i,mo := range analysis {
		if mo.Month == month && mo.Year == year {
			return true,i
		}
	}
	return false,-1
}